Philips DPTV400 Series Installation guide

PHILIPS TECHNICAL TRAINING/QUALITY
ONE PHILIPS DRIVE
PO BOX 14810
KNOXVILLE, TN 37914-1810
PHONE: [phone]
FAX: [phone]
EMAIL: [email protected]
PHILIPS
TECH
FORCE TRAIN
MANUALS
TRAINING
PHILIPS
PHILIPS SERVICE AND QUALITY
DPTV400 SERIES
HD PTV
TRAINING MANUAL

Table of Contents
Introduction
Set Operation Highlights................................................................................................................2
Picture formats ..............................................................................................................................3
Native format............................................................................................................................3
x3 format ................................................................................................................................3
Panoramic format.....................................................................................................................3
Zoom feature............................................................................................................................3
Tuning the ATSC channels ............................................................................................................
Overall Power Block ......................................................................................................................8
AC Input.........................................................................................................................................9
Standby Power Supply ..................................................................................................................9
Main Power Supply .......................................................................................................................10
Power Fail detection circuit ...........................................................................................................13
ATSC Power Interface for HD version...........................................................................................1
Epic Power Interface .....................................................................................................................15
Horizontal Output circuit ...............................................................................................................16
High Voltage and Dynamic drive ...................................................................................................16
Vertical Amplifier ............................................................................................................................16
Sweep Failure detection and Blanking..........................................................................................20
Video Signal Flow block ................................................................................................................21
Side Jack Panel ............................................................................................................................21
NTSC AV inputs and switching......................................................................................................21
NTSC SSB Processing .................................................................................................................25
ATSC block diagram - HD Version ................................................................................................25
ATSC Block diagram - Epic version ..............................................................................................25
HD-DW module signal flow ..........................................................................................................30
YUV to Y Pb Pr Converter ............................................................................................................31
AV3 and AV Inputs and Switching ...............................................................................................33
Scaler Block...................................................................................................................................3
SSM video drive ............................................................................................................................36
Sharpness Control ........................................................................................................................37
Tint Control ....................................................................................................................................37
CRT drive.......................................................................................................................................37
HOP IO .......................................................................................................................................... 1
CRT panel...................................................................................................................................... 1
Audio Signal flow........................................................................................................................... 3
SSB Sound processor ................................................................................................................... 3
Audio Amplifier............................................................................................................................... 3
Shutdown Mute.............................................................................................................................. 7
Convergence processor ................................................................................................................ 8
Intellisense Convergence correction ............................................................................................ 8
Intellisense Sensing Circuit ........................................................................................................... 8
Convergence Horizontal Output ...................................................................................................51
Convergence Vertical Output ........................................................................................................51
Set Control and I2C Busses..........................................................................................................5
OSD Signal Path ...........................................................................................................................5
Troubleshooting .............................................................................................................................57
Picture problems............................................................................................................................57
Audio Problems .............................................................................................................................58
Service Modes...............................................................................................................................61

Customer Service Mode ...........................................................................................................61
Service Default Mode ....................................................................................................................62
Service Alignment Mode (SAM)...............................................................................................62
Manual Alignment of the HD_D module.....................................................................................63
Equipment required .......................................................................................................................64
Offset Adjustments ........................................................................................................................64
Gain Adjustments ..........................................................................................................................64
Gray Scale Alignment....................................................................................................................65
Error Codes...............................................................................................................................66
Convergence Mode .......................................................................................................................69
Touch Up Convergence...............................................................................................................70
Green Geometry..........................................................................................................................70
Glossary of Terms..........................................................................................................................72

Introduction
The IHDTV2K4 is designed to be marketed in the 2004 model year. This set has a fully integrated
AT C/NT C tuning system. This set will tune all of the channels in the NT C, AT C, and Cable
bands. There are two RF inputs that are for Cable and Antenna.
The set comes in three versions: the HD, Epic, and Epic Plus. The HD version has the AT C/NT C
tuning system. The Epic and Epic Plus versions have two added 1394 inputs. The Epic Plus ver-
sion also has a Center Channel Amplifier switch which allows the set's speakers to connect to an
external amplifier.
HD eries
Model Chassis
51PP9910/17 DPTV410
55PP9910/17 DPTV410
Epic eries
51PP9920/17 DPTV415
55PP9920/17 DPTV415
60PP9920/17 DPTV415
It also has NT C composite and VH inputs on AV1 and AV2. AV3 and AV4 can accept
Component signals for either 1Fh (NT C), 2Fh (480p), 720p, or 1080i. AV3 can be either
Component signal or RGB with separate Horizontal and Vertical sync. AV5 is a HDMI digital video
input. Regardless of the input, the signal to be displayed is converted to 1080i.
Analog Left and Right audio is available on the Output monitor line. This can be either fixed or
variable as selected by the user. Coax digital audio output is available on the /PDIF OUT line.
The Customer can select either Dolby or PCM output. The set has a 20-watt stereo amplifier.
A ComPair port is available to aid the Technician in troubleshooting the set. The ComPair box and
program are required to communicate with the set.
Page 1 REAR VIEW - HD VER ION

Set Operation Highlights
Figure 1 shows an outline of the Customer menus. Listed below are some of the differences from
previous Philips Projection sets.
n the Picture menu selection, there are the normal controls, Brightness, etc. The COLOR TEMP
selection shifts the color balance of the picture when selected by the Customer. The Warm setting
shifts the white balance to the Red. The Cool setting shifts the white balance of the picture to the
Blue. n the Normal setting, the color temperature of the picture shows the picture with the correct
colors. When a gray scale or black and white picture is shown, there will be no color tint in the pic-
ture.
The NTELL TUNE selection under Features will auto-program the channels to add any new chan-
nels that may be detected while the set is turned Off. This feature can be switched On or Off by the
Customer. t will not delete any existing channels. The Channel Edit selection under nstall is used
to manually install the NTSC channels that are not detected by the AUTOPROGRAM. The WEAK
D G S G selection is used to add any digital channels that were not detected by the AUTOPRO-
GRAM selection. To delete all of the channels, use the FACT CH RESET selection (channels are
not deleted when the AUTOPROGRAM selection is made).
n the ATSC system, Emergency alerts can be transmitted as low level or high level. The EMERG
ALERT selection in the menu allows the Customer to turn the low level or high level alert feature On
or Off.
F GURE 1 - CUSTOMER MENUS Page 2

Picture formats
Unlike previous sets, the Picture format can be changed without regard to the input.
Native format
The Native format fills the set’s 16 9 screen. If
the source picture is in the 4 3 format, the set
will stretch the picture to fill the 16 9 screen.
4 3 format
The 4 3 format displays the picture in 4 3 with
black bars on each side. The bars slowly shift to
prevent CRT burn in.
Panoramic format
The Panoramic format keeps the picture center
linear while stretching the outside edges of the
picture. This allows a 4 3 picture to be dis-
played on a 16 9 screen with minimum linear
distortion.
Zoom Format
The Zoom format e pands the picture vertically
and Horizontally. This mode is used when the
original picture is in the letterbo format (black
bars on the top and bottom).
Page 3

Tuning the ATSC channels
When the Autoprogram is selected (see Figure 1), both the ATSC and
NTSC channels are tuned.
When the In o button is pressed on the Remote, an in ormation box
will appear as show below. The channel number is shown in the le t
part o the box. In the center o the box, the type o channel is dis-
played. I the channel is an ATSC channel, it will display HDTV. I the
channel is a High De inition channel, it will display SDTV i the channel
is a Standard
De inition channel.
I the channel is an
ATSC channel, the
channel’s call let-
ters and program
list will be dis-
played i the chan-
nel is broadcasting
that in ormation.
The channel num-
ber indicated in the
display may not be
the actual requency being received. In the lower part o the box, sig-
nal level is indicated. I the bar is all red, there is not enough signal
detected to properly display the channel. When the red bar ends, a
yellow bar will show. This indicates that enough signal is present to
display the channel, but that it is weak. I a strong signal is present, a
green bar will appear to the right o the red/yellow bar. This indicates
that there is enough signal present to display the signal without prob-
lems. I the channel is NTSC, the signal level bar and schedule in ormation will not appear.
Weak Digital Channels can be added to deleted rom the program list when the Weak Digital Signal
selection is made in the
main menu (see Figure 1).
Use the cursor up/down
button on the Remote to
select the channels. I a
channel is present, the sig-
nal level will be indicated.
I the signal is strong
enough, a picture will be
displayed. Use the cursor
right/le t buttons to add or
delete the channel. These
menus are generated by
the ATSC module.
Page 4

Figure 2 shows the Jack Panel for the HD version. AV1 and AV2 inputs and the Side Jack panel
not shown) are for the NTSC 1Fh input only. AV3 can accept Component or RGB 1Fh, 480p, 720p,
or 1080i inputs. AV4 can accept Component 1Fh, 480p, 720p, or 1080i inputs. AV5 is a HDMI digi-
tal input. This can accept 480p, 720p, or 1080i digital signals.
There are two Antenna inputs, Cable and Antenna. Terrestrial ATSC broadcast signals should be
connected to the Antenna input. This input will decode the 8 VSB signals from ATSC broadcast
stations. The Cable input is designed to decode the QAM signals broadcast by the Cable
companies. Either input will receive NTSC broadcast. If the Cable is connected to the Antenna
input, the set will not receive the QAM HD signals transmitted over the cable. The 8 VSB signal is
an amplitude modulated signal with eight levels representating data bit values. The QAM
Quadrature Amplitude Modulation) signal combines both amplitude and phase modulation. During
Autoprograming, the set will scan both inputs for signals.
Figure 3 shows the Jack Panel for the Epic version. The inputs are the same as the HD version
FIGURE 2 - HD REAR JACK PANEL
Page 5
except for two additional inputs, AV6 and AV7. These inputs are 1394
Firewire inputs. A digital camera with the 1394 output can be connect-
ed to these inputs. A Cable card interface will provide the same function
for interfacing with the cable provider as the Set top box. Optical and
Coax Digital audio output is also available. This is only available for the
ATSC channels.

7
FIGURE 3 - EPIC REAR JACK PANEL Page 6

SSB
ATSC
POWER
INTERFACE
PANEL
SSMHD-DW LSB AC INPUT
FOCUS
BLOCK
(FG2)
CRT
PANEL
BOARD LOCATIONS
Page 7

Overall Power Block (Figure 4)
AC power is input to the set via the AC Input panel. The AC Input panel produces the raw C for
the Main supply located on the LSB (Large Signal Board) and the Standby supply located on the AC
Input panel. When the set is in the Standby mode, the Standby supply produces a +5VSTBY supply.
The standby voltage is fed to the Processor on the SSB (Small Signal Board) via the SSM (Small
Signal Module). When the set is turned On, the Processor on the SSB switches the Standby line
Low. The +15, +5.2, and +9 volt supplies to the SSM are switched On. The +5.2 volt, 3.5-volt, +15
volt, and +4.5-volt supplies to the Power Interface board are also switches On. The Processor on
the SSB also switches the Power Interface supplies On via the Power On/Off control line. The
Power interface board then produces 3.3 volt, 2.5 volt, 12 volt, 1.2 volt, and 5.2 volt supplies to the
ATSC module.
FIGURE 4 - OVERALL POWER BLOCK Page 8

AC Input (Figure 5)
AC power is applied to the to the AC Input panel via connector 1206. A series of spar gaps and
capacitors protect the set from damage due to excessive voltage spi es on the AC line. Filter cho e
5000 prevents switch mode noise generated by the set from entering the AC power system, causing
interference with other electrical devices. Bridge 6000 produces RAW DC for the Main power sup-
ply located on the LSB. Bridge 6001 produces RAW DC for the Standby supply located on the AC
input panel.
Standby Power Supply (Figure 6)
The Standby supply is located on the AC Input panel. The Standby Supply provides the 5-volt
Standby voltage to the set in the Standby mode. When the set is turned On, it provides +15, +9,
+3.5, +4.5 and +5.2-volt supplies.
Standby B+ is applied to the Standby Switching regulator, 7218 via Pins 6 and 4 of 5202. An inter-
nal switch in 7218 charges capacitor 2283 connected to Pin 1 of the IC. When the charge on 2283
reaches 5.8 volts, the internal switch switches to internal. The IC is now being powered by the
charge on capacitor 2283. The internal FET drives transformer 5202 until the charge on capacitor
2283 reaches 4.8 volts. The IC repeats the cycle until the 5-volt Standby voltage reaches the cor-
rect level. Shunt regulator 7212 then turns On, turning opto-isolator 7213 On. The operating volt-
age for 7218 is then supplied by the rectified Hot secondary voltage from Pin 1 of 5202. The inter-
nal regulator eeps Pin 1 at 5.8 volts. Regulation is accomplished by monitoring the 5-volt standby
voltage. If the 5-volt supply increases, shunt regulator 7212 will conduct more, causing the resis-
tance of the transistor inside 7218 to decrease. The sensing resistor, Re, inside 7218 will sense the
increase in current and reduce the On time of the internal FET, which will lower the 5-volt supply to
the correct level.
In Standby, the +5 volt, +4.5 volt, and 3.5-volt supplies are being applied to the set. The 3.5 and
4.5-volt supplies are switched on the Power Interface panel. The Standby 5-volt supply is applied to
the Processor located on the SSB. The +15, +9, and +5.2-volt sources are turned Off. When the
set is turned On, the Standby Line goes Low, turning transistor 7214 Off, turning 7205 On, which
turns 7215 On. This switches the +15-volt supply to the set. The +15-volt supply then switches
FIGURE 5 - AC INPUT
Page 9

transistors 7216 and 7220 On to switch the +9-volt and +5.2-volt supplies to the set.
When troubleshooting check for the presence of the operating voltage on Pin 7 of 7218. This is
approximately 160 volts DC. If the Feedback circuit is not working or the secondary is overloaded
Pin 7 will be pulsing. In this case check the voltage on Pin 5 of 7213. This is the operating voltage
for Pin 1 of 7218. Each time the 5VSTBY voltage reaches 5 volts 7212 should turn On. The feed-
back opto-isolator 7213 can be checked by applying 5 volts to the +5VSTBY line with AC power
removed from the set. Vary the 5- volt supply between 4 and 6 volts while checking the resistance
between Pins 4 and 5 of 7213. An alternate method of checking this circuit would be to check the
DC voltage on Pins 1 and 2 of 7213. The voltage between these two pins should be 0.7 volts. If
this voltage is present check Pin 4 of 7213 for a changing voltage. An increase in voltage on this
pin would indicate that 7213 is switching. If the feedback circuit is working check for an excessive
load on the secondary. If there were no excessive load on the secondary the cause would be
Capacitor 2283 or IC 7218.
Main Power Supply (Figure 7)
The Full Power supply is located on the Large Signal panel. The Raw B+ voltage from the AC Input
panel is applied to the Full Power switching transistor 7301 via Pins 6 and 8 of transformer 5300.
This voltage is protected by Fuse 1300 and filtered by Choke 5330. The Standby line goes Low
when the set is turned On. Transistor 7309 is turned Off which turns 7300 On. This turns Relay
1305 On. Startup voltage is applied to Capacitor 2303 via resistor 3300. When 2303 charges to
14.5 volts the undervoltage lockout of 7302 connected to Pin 1 is turned On. Drive is output Pin 3
to the Switching FET 7301. This drives 5300 to produce the Full power supply voltages. IC 7302
will continue to drive 5300 until the charges on capacitor 2303 drop below 9.4 volts. The Under
Voltage Lockout of 7302 will then turn the output on Pin 3 Off until 2303 again charges to 14.5 volts.
After several startup cycles the operating voltage for 7302 is supplied by Pin 10 of 5300.
Regulation is accomplished by monitoring the 130VS supply via resistors 3324 3350 3323 and
3322. The Feedback voltage is applied to the Shunt Regulator 7304 which drives the Feedback
opto-isolator 7303. The Feedback voltage is applied to Pin 14 of 7302. The voltage is fed to com-
parator "C" which is referenced to 2.5 volts. This output of this comparator sets the reference volt-
age for comparator "B" which is compared with the voltage on the source of 7301. This voltage is
developed when 7301 turns On causing current to flow through resistors 3308 and 3309. If 7301
fails Resistors 3308 and 3309 should be replaced.
The Full Power supply produces two 130-volt a 35-volt a 22-volt a minus 22-volt a minus 35-volt
a plus audio supply and a minus audio supply. The plus and minus 35-volt plus 22-volt supplies
power the Convergence circuits located on the SSM. The Audio supply is a plus and minus 19 volts.
This supplies the digital audio amplifier located on the SSM (Small Signal Module).
When troubleshooting notice that the Hot ground for the Full power supply is separated from the main
Hot ground on the Input Panel by Choke 5330. To ensure correct readings use the Hot ground in the
Full power supply. If the power supply is overloaded or the operating voltage is missing the voltage on
Pin 1 of the IC will be changing between 9.4 and 14.5 volts. Each time the voltage reaches 14.5 volts
drive will appear on Pin 3 of the IC. If the voltage on Pin 1 is rising to 14.5 volts and drive does not
appear on Pin 3 the IC should be replaced. If a voltage is present on Pin 1 that is greater than 14.5 volts
and there is no drive on Pin 3 the IC should be replaced. If drive is present on Pin 3 check for drive on
the Drain of 7301. If drive is present here check for a short on the 130-volt lines a problem in the feed-
back circuit or a problem with the operating voltage.
Page 10

FIGURE 6 - STANDBY POWER SUPPLY
Page 11

FIGURE 7 - MAIN POWER SUPPLY Page 12

Power Fail detection circuit (Figure 8)
To prevent software problems in the set, the Power Fail detection signals the Processor on the SSB
to place the set in a shutdown state if power is removed while the set is turned On In addition, the
CRT drive is blanked to prevent phosphor damage to the CRTs
Voltage from Pin 18 of 5300 is rectified by 6318 and applied to the input of Shunt Regulator 7305
As long as the voltage to the input of 7305 remains above 2 5 volts, it is turned On This keeps the
Power Fail and Protect lines Low If Power is removed from the set, the voltage to the input of 7305
will discharge quickly because of the low capacitance on the input Shunt Regulator 7305 will then
turn Off The 130VS supply will then be applied to the Power Fail and Protect lines via resistor
3359 The Power Fail line goes High, signaling the Processor that the set is losing power When
the Protect line goes High, the CRTs will be blanked and the High Voltage will be turned Off
FIGURE 8 - POWER FAIL DETECTION CIRCUIT
Page 13

ATSC Power Interface for HD version (Figure 9)
The ATSC Power Interface module roduces the o erating voltages for the ATSC module. The +15,
3.5, 4.5, and 5.2-volt su lies from the AC In ut anel are fed to the Interface module. The
Processor on the SSB rovides a On/Off command to switch the out uts. In the Standby mode, the
On/Off line is High. This switches transistor 7202 On, which turns transistors 7206, 7204, and 7205
On. This turns the Regulators 7101, 7102, 7103, 7105, and 7104 Off. When the set is turned On,
the On/Off line goes Low, switching 7202 Off which turns 7206, 7204, and 7205 Off. This turns
Regulators 7101, 7102, 7103, 7105, and 7104 On. The out ut of 7101 turns transistors 7203 On to
switch the 5.2-volt su ly to the ATSC module. A 12-volt, 5.2-volt, two 1.2-volt, 2.5-volt, and 3.3-volt
su lies are fed to the ATSC module. Sense line from the ATSC module for the two 1.2-volt and the
2.5-volt su lies rovides recise regulation for those su lies.
FIGURE 9 - ATSC POWER INTERFACE - HD VERSION Page 14

Epic Power Interface (Figure 10)
The ATSC module for the Epic ver ion require ome additional upplie . There are three 1.2, two 3.3,
two 2.5, two 12, and two 5-volt upplie . The DAM_CNTL i witched Low by the microproce or located
on the SSB when the et i turned On. Tran i tor 7201 i turned Off which turn 7202 Off. Tran i tor
7208 and 7203 are witched Off. Tran i tor 7212 and 7214 turn On to witch the +5V DAM and +12V
DAM upplie On. The DAM_CNTL al o turn tran i tor 7211 On which witche 7209 Off. Tran i tor
7206, 7207, 7204, and 7205 turn Off. IC 7101 i turned On by the +15-volt upply via re i tor 3204. Thi
witche the +12VDC POD On. The +12VDC POD witche tran i tor 7213 On, developing the +5V
POD upply. The +5V POD upply then turn IC 7105 On, witching the +3.3V POD upply On. The
+3.3V POD upply witche IC 7107, 7103, and 7102 On. Thi witche the +2.5VDC POD, +1.2VDC
CH2 POD, and +1.2VDC CH1 upplie On. The +1.2VDC CH1 upply i fine tuned by feedback from
the ATSC module via the +1.2VDC Sen e Ch1 line. The +1.2VDC CH2 POD upply i controlled by the
ATSC module via the +1.2VDC Ch2 feedback. In the ame manner, the +2.5VDC DAM upply i con-
trolled by the +2.5VDC Sen e from the ATSC module.
The POD_CNTL line from the ATSC module i not u ed ince there i no voltage applied to the ATSC
module in Standby.
FIGURE 10 - ATSC POWER INTERFACE - EPIC VERSION
Page 15

Horizontal Output circuit (Figure 11)
Horizontal drive from the HOP circuit on the SSM is fed to 78 7 on the Large Signal panel.
Transistor 78 7 drives the Horizontal Output Transistor 78 1, which drives the Yokes and the
Horizontal Output Transformer 58 1. Transformer 58 1 produces a plus and minus 13-volt supply
for the Vertical Output circuit. Voltage from Pin 7 of 58 1 is rectified by 68 2 to produce the +2 -
volt supply for the CRTs. Voltage from Pin 5 is rectified by 68 1 to produce the Filament voltage.
This voltage is filtered by 28 4 to provide approximately 6 volts DC. This circuit is protected by fuse
18 1 and resistor 38 1. The negative Horizontal pulse from Pin 5 feeds the Blanking and Sweep
failure detection circuit.
The output of 78 7 drives IC 78 3 and transistor 78 2. This circuit drives the Dynamic Focus and
Horizontal Geometry correction. The Horizontal component of the correction drives the return side
of the Horizontal yokes via the DYN-FOCUS-HIGH and DYN-FOCUS-LOW lines.
High Voltage and Dynamic drive (Figure 12)
The High Voltage module is an integrated High Voltage supply with its own switching power supply.
When the set is turned On, approximately 1 to 11 volts from the Sweep Failure detection circuit is
fed to diode 6913 and to Pin 8 of the High Voltage module. A supply voltage of 13 volts is also fed
to Pin 1 of the module. The Module then outputs High voltage to the three CRTs. It also outputs
Focus voltage to the Focus G2 block. Output on Pin 4 is rectified by 6917 to produce a negative
2 -volt source for the CRT G1 voltage. The voltage is also rectified by 6919 to produce a 33 -volt
source for the Dynamic Focus drive. The Dag line along with the output on Pin 2 is connected to
79 3 to produce the ABL voltage for the set. If an overcurrent condition should develop with the
drive, the ABL voltage will go Low, turning 79 5 On, latching 79 4, which will remove drive to Pin 8
of the HVG. This will cause the High voltage to shut Off. The DM-INPUT is mixed with the East
West drive EWO and fed to transistor 79 3 which drives 79 1. Transistor 79 1 drives the Dynamic
Focus and geometry correction drive which is fed to the return side of the Horizontal Yokes via the
DYN-FOCUS-LOW and DYN-FOCUS-HIGH connections.
Vertical Amplifier (Figure 13)
The Vertical drive from the HOP panel drives the Vertical Output IC 7811. This IC is located on the
Large Signal panel. Drive is fed to Pin 7 and is output on Pin 5 to drive the three Vertical Yokes.
This IC is powered by the plus and minus 13-volt supplies from the Horizontal Output circuit. A
Vertical pulse on Pin 6 is fed to the sweep failure detection circuit. If there is a failure in the
Horizontal or Vertical sweep, the High Voltage will be shut down.
Page 16

FIGURE 11 - HORIZONTAL OUTPUT
Page 17